Antenna



FIG. 1 is a perspective view of a first embodiment of an antenna according to my new and ornamental design;

FIG. 2 is a side view thereof;

FIG. 3 is an opposite side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a perspective view of a second embodiment of an antenna according to my new and ornamental design;

FIG. 9 is a side view thereof;

FIG. 10 is an opposite side view thereof;

FIG. 11 is a rear view thereof;

FIG. 12 is a front view thereof;

FIG. 13 is a top view thereof;

FIG. 14 is a bottom view thereof;

FIG. 15 is a perspective view of a third embodiment of an antenna according to my new and ornamental design;

FIG. 16 is a side view thereof;

FIG. 17 is an opposite side view thereof;

FIG. 18 is a rear view thereof;

FIG. 19 is a front view thereof;

FIG. 20 is a top view thereof; and,

FIG. 21 is a bottom view thereof. 

CLAIM The ornamental design for an antenna, as shown and described. 